Am 10.05.21 um 18:36 schrieb Andrey Grodzovsky:
In case device remove is just simualted by sysfs then verify
device doesn't keep doing DMA to the released memory after
pci_remove is done.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 83006f45b10b..5e6af9e0b7bf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1314,7 +1314,13 @@ amdgpu_pci_remove(struct pci_dev *pdev)
drm_dev_unplug(dev);
amdgpu_driver_unload_kms(dev);
+ /*
+ * Flush any in flight DMA operations from device.
+ * Clear the Bus Master Enable bit and then wait on the PCIe Device
+ * StatusTransactions Pending bit.
+ */
pci_disable_device(pdev);
+ pci_wait_for_pending_transaction(pdev);
}
static void
